Blue Atlas browning needles
My 18 foot blue atlas cedar is getting more and more brown needles. I think it is slowly dying like one I had die 3 years ago. I don't see any bugs on it. I did see evidence of bug holes so i took a knife to investigate but did not find any eggs or bug evidence other than the holes. The trunk has a strange split at the bottom but it looks old and not new. I have included some pictures and am asking for advice on what to do. I gave it water and some some Bayer feed and bug pellets.